EPCS16 データシートの表示（PDF） - Unspecified

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EPCS16

Serial Configuration (EPCS) Devices

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Page 6

Active Serial FPGA Configuration

You can configure multiple devices with a single EPCS device. However, you cannot

cascade EPCS devices. To ensure that the programming file size of the cascaded

FPGAs does not exceed the capacity of an EPCS device, refer to Table 1 on page 1.

Figure 4 shows the AS configuration scheme with multiple FPGAs in the chain. The

first FPGA is the configuration master and its MSEL[] pins are set to AS mode. The

following FPGAs are configuration slave devices and their MSEL[] pins are set to PS

mode.

Figure 4. Multiple Devices in AS Mode (1), (5)

VCC (1)

VCC (1)

VCC (1)

10 kΩ

10 kΩ

10 kΩ

EPCS Device (2)

DATA

DCLK

nCS

ASDI

Altera FPGA (Master)

CONF_DONE

nSTATUS

nCONFIG

nCE

DATA0

DCLK

nCSO

ASDO

nCEO

MSEL[ ]

(3)

Altera FPGA (Slave)

CONF_DONE

nSTATUS

nCONFIG

nCE

DATA0

DCLK

nCEO

N.C.

MSEL[ ]

(4)

Notes to Figure 4:

(1) For more information about the VCC value, refer to the configuration chapter in the appropriate device handbook.

(2) EPCS devices cannot be cascaded.

(3) Connect the MSEL[] input pins to select the AS configuration mode. For more information, refer to the configuration chapter in the appropriate

device handbook.

(4) Connect the MSEL[] input pins to select the PS configuration mode. For more information, refer to the configuration chapter in the appropriate

device handbook.

(5) For more information about configuration pin I/O requirements in an AS configuration scheme for an Altera FPGA, refer to the configuration

chapter in the appropriate device handbook.

Serial Configuration (EPCS) Devices Datasheet

April 2014 Altera Corporation

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